Determination is a very rare item that will drop in any spawn and can be used to get the Mystery Mask. This soul can also be used on Shadow to get Chara. When this rare soul spawns it should play music called Stronger Than You. The determination soul is an item that comes from Undertale.
Its spawn rate is every 10 minutes with a 1/200 chance of actually spawning.
Determination looks like a red heart.
It Also Is A-S Tier Item.
Determination is another name for Heart and in-game addresses it as Heart